Zirconium modified biochar fiber with balanced phosphorus adsorption efficiency and recyclability: A detailed study on the mechanisms of attenuation of adsorption capacity

文献类型： 外文期刊

第一作者： Liu, Ruiqian

作者： Liu, Ruiqian;Zhao, Yingjie;He, Shiying;Feng, Yanfang;Xue, Lihong;Zhao, Yingjie;Liu, Siqi

作者机构：

关键词： 1DL adsorbent; P adsorption; Adsorption attenuation mechanism; Long-term use; Reusability

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：7.3； 五年影响因子：8.1 ）

ISSN： 0269-7491

年卷期： 2025 年 372 卷

页码：

收录情况： SCI

摘要： In the realm of phosphorus (P) adsorption, balancing adsorption capacity and recyclability is crucial. We propose a novel approach by integrating functional metal (Zr) with one-dimensional (1DL) biochar fiber to create P adsorbents. Three synthesis methods-impregnation-pyrolysis, co-precipitation, and hydrothermal synthesis-are evaluated for their effects on P adsorption performances. 1DL adsorbents prepared by impregnationpyrolysis achieve about 100% of P removal at low concentrations (1.1-5.6 mg-P/L), outperforming 0D powdered and 3D porous granular counterparts. The usage cost of the prepared 1D adsorbent (including the preparation and regeneration costs) is 44.8% of commercial Phoslock (R) after 10 cycles. Noteworthy is our effort in delving into the mechanisms underpinning capacity attenuation during the regeneration of the P adsorbent-a facet scarcely explored in antecedent inquiries. Long-term applications over 60 days demonstrate the costeffectiveness and low ion leaching toxicity of the 1DL adsorbent. This study not only advances adsorbent synthesis but also underscores 1DL adsorbents as a promising option for P removal and recovery.

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